Question

how to install python 3 in ubuntu 16.04

Example link

http://releases.ubuntu.com/16.04/ubuntu-16.04.1-server-amd64.iso in

Server install image

The server install image allows you to install Ubuntu permanently on a computer for use as a server. It will not install a graphical user interface.

There are two images available, each for a different type of computer:

64-bit PC (AMD64) server install image Choose this to take full advantage of computers based on the AMD64 or EM64T architecture (e.g., Athlon64, Opteron, EM64T Xeon, Core 2). If you have a non-64-bit processor made by AMD, or if you need full support for 32-bit code, use the i386 images instead. Choose this if you are at all unsure.

in

http://releases.ubuntu.com/16.04/

root@Mitaka-lab:~# apt-get install python3.4 python3.4-dev Reading package lists… Done Building dependency tree Reading state information… Done Note, selecting ‘libpython3.4-minimal’ for regex ‘python3.4’ E: Unable to locate package python3.4-dev E: Couldn’t find any package by glob ‘python3.4-dev’ E: Couldn’t find any package by regex ‘python3.4-dev’ root@Mitaka-lab:~# python --version Python 2.7.12 root@Mitaka-lab:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.1 LTS Release: 16.04 Codename: xenial root@Mitaka-lab:~# which python /usr/bin/python root@Mitaka-lab:~#

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As of Ubuntu 16.04 LTS, Python 3 is default Python! Python 2 is only installed only when needed by packages - but because there is a lot packages who depends on it, so some package surely installed it too.

Keep in mind that Python 3 must be called by python3. python is reserved for Python 2, so it doesn’t break packages who depends on it.

Verify do you have python 3 by executing

python3 --version

Also you can get location of it by executing

which python3

Edit: reformatting answer…

i run python3 --version it show python 3.5.2

which python3 is /usr/bin/python3